Horse Stable Ventilation Calculator
Air changes per hour for a horse stable/barn.
Enter your values
ⓘ Live results
Results
- Air changes target
- 50 ACH
- Required airflow
- 21,600 CFM
- Barn volume
- 25,920 cu ft
Quick answer
Horse stables typically need 4-8 air changes per hour in winter for air quality, rising to 40-60 ACH in summer for cooling.
CFM = volume x ACH / 60
How to use the Horse Stable Ventilation Calculator
- 1Measure the barn's usable volume.
- 2Choose winter (air quality) or summer (cooling) ventilation targets.
- 3Balance ridge vents, eave inlets or fans to hit the required airflow.
Worked example
Using the values the calculator loads with:
Inputs
- Barn length60 ft
- Barn width36 ft
- Average height12 ft
- SeasonSummer cooling
Results
- Air changes target50 ACH
- Required airflow21,600 CFM
- Barn volume25,920 cu ft
Frequently asked questions
Why is winter ACH so much lower than summer?
Winter ventilation only removes ammonia and moisture; summer must also cool the animals with air movement.
Natural or fan ventilation?
Well-designed natural ventilation (ridge and eave) can meet winter needs; summer often needs fan assistance.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.